Gas supply apparatus for a gas fired radiant heater

ABSTRACT

A gas supply apparatus for a gas fired radiant heater has a compact structure, which includes a pressure regulator extending vertically and disposed at one side of an assembly seat, a switch button disposed at one side of the assembly seat, a temperature-control switch and a mercury switch provided on a horizontal platform extending from one side of the assembly seat, a gas pipe vertically extending in a substantially upright straight route from the assembly seat, a mixing tube securely connected on an upper end of the gas pipe by means of a clamping ring, a burner cap provided on an upper end of the mixing tube and a temperature sensor and an igniter respectively provided at one side of the burner cap, whereby the structure of the gas supply apparatus is optimized, and the working reliability and safety are ensured.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a gas supply apparatus used in a gas fired radiant heater, the gas supply apparatus particularly having an optimized compact structure which has a high working reliability and low production cost.

[0003] 2. Description of Related Art

[0004] Throughout the world heaters are used in residences for heating of space due to their convenience and general low cost. There are various types of radiant heater, such as an electrical radiant heater and a gas fired radiant heater.

[0005] One conventional gas fired radiant heater suitable for both residences and outdoor use is sold on the market. As shown in FIG. 4, the conventional gas fired radiant heater has a gas supply apparatus, which comprises a pressure regulator (80) disposed in a horizontal extending position, a first assembly seat (82) disposed at one side of the pressure regulator (80) and integrated with a first gas conduit (820) in communication with the pressure regulator (80), a mercury switch (822) and a temperature-control switch (824) provided on a platform of the first assembly seat (82), a second assembly seat (84) disposed at an upper position above the first assembly seat (82), a switch button (840) provided at one side of the second assembly seat (84) and disposed in an inclined position, a gas pipe (86) having a lower end in communication with an outlet end of a second gas conduit integrated with the second assembly seat (84) and an upper end fixed with a nozzle (860), a mixing tube (88) securely connected around the upper end of the gas pipe (86) by means of a screw (862), a burner cap (90) provided on an upper end of the mixing tube (88), an igniter (92) and a temperature sensor (94) respectively provided at one side of the burner cap (90).

[0006] The aforesaid conventional gas supply apparatus of the radiant heater has the following disadvantages:

[0007] 1. The structure of the aforesaid conventional gas supply apparatus is complex, and the assembly and disassembly of the gas supply apparatus is difficult, so that the production cost of the conventional gas supply apparatus is uneconomic and the repair of the gas supply apparatus is also difficult.

[0008] 2. The gas pipe (86) extends in a serpentine shape, so that the gas is not delivered from the gas tank to the nozzle (32) in a straight route.

[0009] 3. The mixing tube (88) is connected with the upper end of the gas pipe (86) by means of a screw (862), whereby the assembly and disassembly of the mixing tube (88) is difficult.

[0010] Therefore, it is an objective of the invention to provide an improved gas supply apparatus for a gas fired radiant heater to mitigate and/or obviate the aforementioned problems.

SUMMARY OF THE INVENTION

[0011] The main object of the present invention is to provide a gas supply apparatus for a gas fired radiant heater, the gas supply apparatus having a compact structure, which comprises a pressure regulator extending vertically and disposed at one side of an assembly seat, a switch button disposed at one side of the assembly seat, a temperature-control switch and a mercury switch provided on a horizontal platform extending from one side of the assembly seat, a gas pipe extending in a substantially upright straight route from the assembly seat, a mixing tube securely connected on an upper end of the gas pipe by means of a clamping ring, a burner cap provided on an upper end of the mixing tube, a temperature sensor and an igniter respectively provided at one side of the burner cap, whereby the structure of the gas supply apparatus is optimized, and the working reliability and safety are ensured.

[0012] Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0013]FIG. 1 is an exploded perspective view of a gas supply apparatus for a gas fired radiant heater in accordance with the invention;

[0014]FIG. 2 is a perspective assembly view of the gas supply apparatus in accordance with the invention;

[0015]FIG. 3 is a perspective view of gas supply apparatus assembled in the gas fired radiant heater in accordance with the invention; and

[0016]FIG. 4 is a perspective view of a conventional gas supply apparatus for a gas fired radiant heater.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0017] As shown in FIGS. 1 and 2, the present invention relates to a gas supply apparatus for a gas fired radiant heater. The gas supply apparatus comprises a pressure regulator (10), an assembly seat (20), a switch button (22), a mercury switch (24), a temperature-control switch (26), a vertical extending gas pipe (30), a mixing tube (40) and a burner cap (50).

[0018] The pressure regulator (10) is disposed in a vertically extending position and has an inlet end (12) extending vertically downward and in communication with a gas tank, and an outlet end (not numbered in drawings) extending vertically upward and in communication with the assembly seat (20).

[0019] The assembly seat (20) is disposed at one side of an upper position of the pressure regulator (10) and integrated with a gas conduit (not numbered in drawings) having a lower end in communication with the outlet of the pressure regulator (10) and an upper end in communication with a lower end of the gas pipe (30). The switch button (22) is provided at one side of the assembly seat (20) to execute on-off control of the gas delivery of the radiant heater. The mercury switch (24) and the temperature-control switch (26) are secured on a platform (28) extending horizontally from one side of the assembly seat (20). The mercury switch (24) is intended to shut off the gas delivery of the radiant heater when the radiant heater is no longer upright due to an accident. The temperature-control switch (26) is cooperated with a temperature sensor (54) disposed at one side of the burner cap (50) to perform the control of the gas delivery so as to realize temperature control of the radiant heater.

[0020] The gas pipe (30) extends upright from the assembly seat (20) in a vertical direction. A nozzle (32) is provided on an upper end of the gas pipe (30). The mixing tube (40) is tightly mounted around the upper end of the gas pipe (30) by means of a clamping ring (42). The air and gas are mixed in the mixing tube (40) for combustion. The burner cap (50) is disposed on the upper end of the mixing tube (40). An igniter (52) is provided at one side of the burner cap (50). The switch button (22) disposed at one side of the assembly seat (20) is rotatably around an axis extending perpendicular to the extending direction of the gas pipe (30). When the switch button (22) of the radiant heater is turned by a user, the gas is directed from the gas tank to the nozzle (32), and mixed with the air in the mixing tube (40). Then the mixed gas and air are ignited by the igniter (52).

[0021] Now with reference to FIG. 3, the gas supply apparatus is arranged in an upper portion in a housing (60) of the radiator. A gas tank (not shown) is received in a lower portion of the housing (60). The housing (60) further has a large circular plate (62) secured on a bottom thereof. A circular cover plate (64) is placed on a top of the burner cap (50).

[0022] The gas supply apparatus of the invention has following advantages:

[0023] 1. The gas supply apparatus has a compact structure, which is easy to be assembled in the production and/or to be disassembled and reassembled in repair.

[0024] 2. The gas is delivered in a substantially straight route from the gas tank through the pressure regulator (10), the gas conduit of the assembly seat (20) and the gas pipe (30) to the nozzle (32).

[0025] 3. The connection between every two joint parts of the gas supply apparatus is stable and reliable because the joint parts are aligned with each other in a straight line.

[0026] 4. Because the mixing tube (40) is tightly connected with the upper end of the gas pipe (30) by means of a clamping ring (42), the assembly and disassembly of the mixing tube (40) are very simple.

[0027] It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed. 

What is claimed is:
 1. A gas supply apparatus for a gas fired radiant heater, the gas supply apparatus comprising a pressure regulator (10); an assembly seat (20) disposed at an upper position of the pressure regulator (10) and integrated with a gas conduit having a lower end in communication with an outlet of the pressure regulator (10), a switch button (22) provided at one side of the assembly seat (20), a mercury switch (24) and a temperature-control switch (26) provided on a platform extending from one side of the assembly seat (20); a gas pipe (30) having a lower end in communication with an upper end of the gas conduit of the assembly seat (20) and an upper end fixed with a nozzle (32) thereon; a mixing tube (40) securely connected around the upper end of the gas pipe (30); a burner cap (50) provided on an upper end of the mixing tube (40) and having an igniter (52) provided at one side of the burner cap (50) and cooperated with the switch button (22), a temperature sensor (54) provided at one side of the burner cap (50) and cooperated with the temperature-control switch (26).
 2. The gas supply apparatus for the gas fired radiant heater as claimed in claim 1, wherein the switch button (22) disposed at one side of the assembly seat (20) is perpendicular to the extending direction of the gas pipe (30).
 3. The gas supply apparatus for the gas fired radiant heater as claimed in claim 1, wherein the gas pipe (30) extends vertically in a straight route.
 4. The gas supply apparatus for the gas fired radiant heater as claimed in claim 1, wherein the mixing tube (40) is securely connected with the upper end of the gas pipe (30) by means of a clamping ring (42). 